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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 | /* * linux/arch/m68k/sun3/config.c * * Copyright (C) 1996,1997 Pekka Pietik{inen * * This file is subject to the terms and conditions of the GNU General Public * License. See the file COPYING in the main directory of this archive * for more details. */ #include <linux/types.h> #include <linux/kernel.h> #include <linux/mm.h> #include <linux/seq_file.h> #include <linux/tty.h> #include <linux/console.h> #include <linux/init.h> #include <linux/bootmem.h> #include <asm/oplib.h> #include <asm/setup.h> #include <asm/contregs.h> #include <asm/movs.h> #include <asm/pgtable.h> #include <asm/pgalloc.h> #include <asm/sun3-head.h> #include <asm/sun3mmu.h> #include <asm/rtc.h> #include <asm/machdep.h> #include <asm/idprom.h> #include <asm/intersil.h> #include <asm/irq.h> #include <asm/sections.h> #include <asm/segment.h> #include <asm/sun3ints.h> char sun3_reserved_pmeg[SUN3_PMEGS_NUM]; extern u32 sun3_gettimeoffset(void); static void sun3_sched_init(irq_handler_t handler); extern void sun3_get_model (char* model); extern int sun3_hwclk(int set, struct rtc_time *t); volatile char* clock_va; extern unsigned long availmem; unsigned long num_pages; static void sun3_get_hardware_list(struct seq_file *m) { seq_printf(m, "PROM Revision:\t%s\n", romvec->pv_monid); } void __init sun3_init(void) { unsigned char enable_register; int i; m68k_machtype= MACH_SUN3; m68k_cputype = CPU_68020; m68k_fputype = FPU_68881; /* mc68881 actually */ m68k_mmutype = MMU_SUN3; clock_va = (char *) 0xfe06000; /* dark */ sun3_intreg = (unsigned char *) 0xfe0a000; /* magic */ sun3_disable_interrupts(); prom_init((void *)LINUX_OPPROM_BEGVM); GET_CONTROL_BYTE(AC_SENABLE,enable_register); enable_register |= 0x50; /* Enable FPU */ SET_CONTROL_BYTE(AC_SENABLE,enable_register); GET_CONTROL_BYTE(AC_SENABLE,enable_register); /* This code looks suspicious, because it doesn't subtract memory belonging to the kernel from the available space */ memset(sun3_reserved_pmeg, 0, sizeof(sun3_reserved_pmeg)); /* Reserve important PMEGS */ /* FIXME: These should be probed instead of hardcoded */ for (i=0; i<8; i++) /* Kernel PMEGs */ sun3_reserved_pmeg[i] = 1; sun3_reserved_pmeg[247] = 1; /* ROM mapping */ sun3_reserved_pmeg[248] = 1; /* AMD Ethernet */ sun3_reserved_pmeg[251] = 1; /* VB area */ sun3_reserved_pmeg[254] = 1; /* main I/O */ sun3_reserved_pmeg[249] = 1; sun3_reserved_pmeg[252] = 1; sun3_reserved_pmeg[253] = 1; set_fs(KERNEL_DS); } /* Without this, Bad Things happen when something calls arch_reset. */ static void sun3_reboot (void) { prom_reboot ("vmlinux"); } static void sun3_halt (void) { prom_halt (); } /* sun3 bootmem allocation */ static void __init sun3_bootmem_alloc(unsigned long memory_start, unsigned long memory_end) { unsigned long start_page; /* align start/end to page boundaries */ memory_start = ((memory_start + (PAGE_SIZE-1)) & PAGE_MASK); memory_end = memory_end & PAGE_MASK; start_page = __pa(memory_start) >> PAGE_SHIFT; num_pages = __pa(memory_end) >> PAGE_SHIFT; high_memory = (void *)memory_end; availmem = memory_start; m68k_setup_node(0); availmem += init_bootmem_node(NODE_DATA(0), start_page, 0, num_pages); availmem = (availmem + (PAGE_SIZE-1)) & PAGE_MASK; free_bootmem(__pa(availmem), memory_end - (availmem)); } void __init config_sun3(void) { unsigned long memory_start, memory_end; printk("ARCH: SUN3\n"); idprom_init(); /* Subtract kernel memory from available memory */ mach_sched_init = sun3_sched_init; mach_init_IRQ = sun3_init_IRQ; mach_reset = sun3_reboot; arch_gettimeoffset = sun3_gettimeoffset; mach_get_model = sun3_get_model; mach_hwclk = sun3_hwclk; mach_halt = sun3_halt; mach_get_hardware_list = sun3_get_hardware_list; memory_start = ((((unsigned long)_end) + 0x2000) & ~0x1fff); // PROM seems to want the last couple of physical pages. --m memory_end = *(romvec->pv_sun3mem) + PAGE_OFFSET - 2*PAGE_SIZE; m68k_num_memory=1; m68k_memory[0].size=*(romvec->pv_sun3mem); sun3_bootmem_alloc(memory_start, memory_end); } static void __init sun3_sched_init(irq_handler_t timer_routine) { sun3_disable_interrupts(); intersil_clock->cmd_reg=(INTERSIL_RUN|INTERSIL_INT_DISABLE|INTERSIL_24H_MODE); intersil_clock->int_reg=INTERSIL_HZ_100_MASK; intersil_clear(); sun3_enable_irq(5); intersil_clock->cmd_reg=(INTERSIL_RUN|INTERSIL_INT_ENABLE|INTERSIL_24H_MODE); sun3_enable_interrupts(); intersil_clear(); } |